﻿using System;
using System.Web;

namespace StoragePeriod.COMP
{
	/// <summary>
	/// Request操作类
	/// </summary>
	public class Requests {
		/// <summary>
		/// 判断当前页面是否接收到了Post请求
		/// </summary>
		/// <returns>是否接收到了Post请求</returns>
		public static bool IsPost() {
			return HttpContext.Current.Request.HttpMethod.Equals("POST");
		}

		/// <summary>
		/// 判断当前页面是否接收到了Get请求
		/// </summary>
		/// <returns>是否接收到了Get请求</returns>
		public static bool IsGet() {
			return HttpContext.Current.Request.HttpMethod.Equals("GET");
		}

		/// <summary>
		/// 返回指定的服务器变量信息
		/// </summary>
		/// <param name="strName">服务器变量名</param>
		/// <returns>服务器变量信息</returns>
		public static string GetServerString(string strName) {
			if (HttpContext.Current.Request.ServerVariables[strName] == null)
				return "";
			else
				return HttpContext.Current.Request.ServerVariables[strName].ToString();
		}

		/// <summary>
		/// 返回上一个页面的地址
		/// </summary>
		/// <returns>上一个页面的地址</returns>
		public static string GetUrlReferrer() {
			string retVal = null;

			try {
				retVal = HttpContext.Current.Request.UrlReferrer.ToString();
			}
			catch { }

			if (retVal == null)
				return "";
			else
				return retVal;
		}

		/// <summary>
		/// 得到当前完整主机头
		/// </summary>
		/// <returns></returns>
		public static string GetCurrentFullHost() {
			HttpRequest request = System.Web.HttpContext.Current.Request;
			if (!request.Url.IsDefaultPort) {
				return string.Format("{0}:{1}", request.Url.Host, request.Url.Port.ToString());
			}
			return request.Url.Host;
		}

		/// <summary>
		/// 得到主机头
		/// </summary>
		/// <returns></returns>
		public static string GetHost() {
			return HttpContext.Current.Request.Url.Host;
		}


		/// <summary>
		/// 获取当前请求的原始 URL(URL 中域信息之后的部分,包括查询字符串(如果存在))
		/// </summary>
		/// <returns>原始 URL</returns>
		public static string GetRawUrl() {
			return HttpContext.Current.Request.RawUrl;
		}

		/// <summary>
		/// 判断当前访问是否来自浏览器软件
		/// </summary>
		/// <returns>当前访问是否来自浏览器软件</returns>
		public static bool IsBrowserGet() {
			string[] BrowserName = { "ie", "opera", "netscape", "mozilla", "konqueror", "firefox" };
			string curBrowser = HttpContext.Current.Request.Browser.Type.ToLower();
			for (int i = 0; i < BrowserName.Length; i++) {
				if (curBrowser.IndexOf(BrowserName[i]) >= 0) {
					return true;
				}
			}
			return false;
		}

		/// <summary>
		/// 判断是否来自搜索引擎链接
		/// </summary>
		/// <returns>是否来自搜索引擎链接</returns>
		public static bool IsSearchEnginesGet() {
			if (HttpContext.Current.Request.UrlReferrer == null) {
				return false;
			}
			string[] SearchEngine = { "google", "yahoo", "msn", "baidu", "sogou", "sohu", "sina", "163", "lycos", "tom", "yisou", "iask", "soso", "gougou", "zhongsou" };
			string tmpReferrer = HttpContext.Current.Request.UrlReferrer.ToString().ToLower();
			for (int i = 0; i < SearchEngine.Length; i++) {
				if (tmpReferrer.IndexOf(SearchEngine[i]) >= 0) {
					return true;
				}
			}
			return false;
		}

		/// <summary>
		/// 获得当前完整Url地址
		/// </summary>
		/// <returns>当前完整Url地址</returns>
		public static string GetUrl() {
			return HttpContext.Current.Request.Url.ToString();
		}

		/// <summary>
		/// 获得指定Url参数的值
		/// </summary>
		/// <param name="strName">Url参数</param>
		/// <returns>Url参数的值</returns>
		public static string GetQueryString(string strName) {
			if (HttpContext.Current.Request.QueryString[strName] == null) {
				return "";
			}
			return HttpContext.Current.Request.QueryString[strName].ToString();
		}

		/// <summary>
		/// 获得当前页面的名称
		/// </summary>
		/// <returns>当前页面的名称</returns>
		public static string GetPageName() {
			string[] urlArr = HttpContext.Current.Request.Url.AbsolutePath.Split('/');
			return urlArr[urlArr.Length - 1].ToLower();
		}

		/// <summary>
		/// 返回表单或Url参数的总个数
		/// </summary>
		/// <returns></returns>
		public static int GetParamCount() {
			return HttpContext.Current.Request.Form.Count + HttpContext.Current.Request.QueryString.Count;
		}

		/// <summary>
		/// 获得指定表单参数的值
		/// </summary>
		/// <param name="strName">表单参数</param>
		/// <returns>表单参数的值</returns>
		public static string GetFormString(string strName) {
			if (HttpContext.Current.Request.Form[strName] == null)
				return "";
			else
				return HttpContext.Current.Request.Form[strName];
		}

		/// <summary>
		/// 获得Url或表单参数的值, 先判断Url参数是否为空字符串, 如为True则返回表单参数的值
		/// </summary>
		/// <param name="strName">参数</param>
		/// <returns>Url或表单参数的值</returns>
		public static string GetString(string strName) {
			if ("".Equals(GetQueryString(strName))) {
				return GetFormString(strName);
			}
			else {
				return GetQueryString(strName);
			}
		}

		/// <summary>
		/// 获得指定Url参数的int类型值
		/// </summary>
		/// <param name="strName">Url参数</param>
		/// <param name="defValue">缺省值</param>
		/// <returns>Url参数的int类型值</returns>
		public static int GetQueryInt(string strName, int defValue) {
			return Cast.ToInteger(HttpContext.Current.Request.QueryString[strName],defValue);
		}

		/// <summary>
		/// 获得指定表单参数的int类型值
		/// </summary>
		/// <param name="strName">表单参数</param>
		/// <param name="defValue">缺省值</param>
		/// <returns>表单参数的int类型值</returns>
		public static int GetFormInt(string strName, int defValue) {
			return Cast.ToInteger(HttpContext.Current.Request.Form[strName]);
		}

		/// <summary>
		/// 获得指定Url或表单参数的int类型值, 先判断Url参数是否为缺省值, 如为True则返回表单参数的值
		/// </summary>
		/// <param name="strName">Url或表单参数</param>
		/// <param name="defValue">缺省值</param>
		/// <returns>Url或表单参数的int类型值</returns>
		public static int GetInt(string strName, int defValue) {
			if (GetQueryInt(strName, defValue) == defValue) {
				return GetFormInt(strName, defValue);
			}
			else {
				return GetQueryInt(strName, defValue);
			}
		}

		/// <summary>
		/// 获得指定Url参数的float类型值
		/// </summary>
		/// <param name="strName">Url参数</param>
		/// <param name="defValue">缺省值</param>
		/// <returns>Url参数的int类型值</returns>
		public static float GetQueryFloat(string strName, float defValue) {
			return Cast.ToFloat(HttpContext.Current.Request.QueryString[strName]);
		}


		/// <summary>
		/// 获得指定表单参数的float类型值
		/// </summary>
		/// <param name="strName">表单参数</param>
		/// <param name="defValue">缺省值</param>
		/// <returns>表单参数的float类型值</returns>
		public static float GetFormFloat(string strName, float defValue) {
			return Cast.ToFloat(HttpContext.Current.Request.Form[strName]);
		}

		/// <summary>
		/// 获得指定Url或表单参数的float类型值, 先判断Url参数是否为缺省值, 如为True则返回表单参数的值
		/// </summary>
		/// <param name="strName">Url或表单参数</param>
		/// <param name="defValue">缺省值</param>
		/// <returns>Url或表单参数的int类型值</returns>
		public static float GetFloat(string strName, float defValue) {
			if (GetQueryFloat(strName, defValue) == defValue) {
				return GetFormFloat(strName, defValue);
			}
			else {
				return GetQueryFloat(strName, defValue);
			}
		}

		/// <summary>
		/// 获得当前页面客户端的IP
		/// </summary>
		/// <returns>当前页面客户端的IP</returns>
		public static string GetIP() {
			string result = String.Empty;

			result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

			if (null == result || result == String.Empty || !Verify.IsIP(result))
				return "0.0.0.0";
			else
				return result;
		}

		/// <summary>
		/// 获得真实IP
		/// </summary>
		public static string GetRealIP() {
			string result = String.Empty;

			result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
			if (null == result || result == String.Empty) {
				result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
			}

			if (null == result || result == String.Empty) {
				result = HttpContext.Current.Request.UserHostAddress;
			}

			if (null == result || result == String.Empty || !Verify.IsIP(result))
				return "0.0.0.0";
			else
				return result;
		}

		/// <summary>
		/// 保存用户上传的文件
		/// </summary>
		/// <param name="path">保存路径</param>
		public static void SaveRequestFile(string path) {
			if (HttpContext.Current.Request.Files.Count > 0) {
				HttpContext.Current.Request.Files[0].SaveAs(path);
			}
		}

	}
}
